Table 5. TBP-based factors of intentions to receive a COVID-19 booster.

	International Students Block 1: R2 = .08		Domestic Students Block 1: R2 = .15		Combined Group Block 1: R2 = .08
Factors	Β (95% CI)	p	Β (95% CI)	p	Β (95% CI)	p
Age (18–22)	1.72 (-.87, 4.31)	.192	.69 (-1.04, 2.42)	.432	.27 (-.96, 1.51)	.662
Sex (male)	-.84 (-2.32, .64)	.265	-.64 (-2.14, .86)	.402	-1.27 (-2.27, -.27)	.012 *
Asian (Other)	.64 (-2.98, 4.26)	.728	-1.38 (-5.18, 2.42)	.476	.12 (-2.43, 2.68)	.924
White (Other)	-.2.16 (-4.25, 3.82)	.916	-.90 (-4.35, 2.53)	.603	-.89 (-3.49, 1.70)	.498
Black (Other)	-2.29 (-7.09, 2.51)	.347	.68 (-4.09, 5.47)	.777	-1.05 (-4.41, 2.30)	.538
Hispanic (Other)	2.81 (-1.56, 7.20)	.206	-1.35 (-5.97, 3.27)	.565	1.02 (-2.14, 4.18)	.527
Chronic illness (Healthy)	-.53 (-3.17, 2.10)	.690	1.34 (-.02, 2.70)	.054	1.26 (.07, 2.46)	.038 *
Updated vaccination (Updated)	-.03 (-1.68, 1.61)	.967	1.65 (-.03, 3.34)	.055	.87 (-.30, 2.05)	.147
Smoking (Smoker)	-.66 (-3.38, 2.06)	.633	1.64 (.10, 3.18)	.037 *	.67 (-.65, 1.99)	.318
Received COVID-19 vaccine	-.89 (-2.56, .76)	.289	1.48 (.10, 2.85)	.035 *	.85 (-.15, 1.86)	.097
Financial status (Scholarship)	.62 (-.94, 2.19)	.434	-1.41 (-2.97, .14)	.075	-.004 (-1.06, 1.05)	.995
Parent education (< college)	-1.11 (-2.69, .45)	.162	.55 (-.92, 2.04)	.459	-.18 (-1.24, .87)	.730
Health insurance	1.29 (-2.92, 5.51)	.545	.55 (-1.03, 2.15)	.049 *	1.35 (-.09, 2.80)	.095
	Block 2: R2 = .65		Block 2: R2 = .72		Block 2: R2 = .68
Attitudes	.09 (.02, .16)	.141	.05 (-.02, .13)	.153	.07 (.02, .12)	.004 *
Behavioral intentions	.53 (.43, .64)	< .001 *	.64 (.56, .73)	< .001 *	.61 (.55, .68)	< .001 *
PBC	.05 (-.02, .13)	.163	.05 (-.02, .13)	.203	.04 (-.01, .10)	.071
Subjective norms	.18 (.06, .29)	.002 *	.10 (-.01, .23)	.096	.13 (.05, .21)	< .001 *

Note.

*Results were statistically significant; CI: confidence interval; PBC: perceived behavioral control.